Idle Switch

Switch is connected in series between ignition switch and coasting valve solenoid. Idle switch detects deceleration condition and current between ignition switch and coasting valve is cut off when throttle valve is in idle position. When engine is idling, circuit is completed between No. 1 control box (Auto. Trans.), and coasting valve operates during deceleration from speed of more than 1200 RPM (Man. Trans.) or 1400 RPM (Auto. Trans.). On automatic transmission models, the idle switch also sends idle position signal to No. 1 control box to control trailing ignition system.